Closure liner



J, P. CU RRAN Sept. 5, 1944.

CLOSURE LINER Filed March 25, 1942 M Mr T r mu vC P e m w J ATTORN SPatented Sept. 5, 1944 CLOSURE LINE-R Jerome P. Curran, Toledo, Ohio,assignor to Owens-Illinois Glass Company, a corporation of OhioApplication March 25, 1942, Serial No. 436,143

' 1 Claim. (01. 288- 33) The present invention relates to improvementsin closures and liners therefor and is particularly concerned with theprovision of a satisfactory substitute for cork and like conventionalliner materials which are usually employed in sealing beverage bottles.

An object of my invention is the provision of a liner formed fromliquid-proofed pulpboard, cot' ton, or similar material and sofabricated that it may be sufficiently and readily compressed duringapplication to a container to insure effective sealing thereof.

Another object is the provision of a liquidproofed pulpboard liner forbottle and jar closures Which is formed with a multiplicity of openingsso arranged as to facilitate compression of the liner when applied to acontainer.

Other objects will be in part apparent and in part pointedouthereinafter.

In the drawing:

Fig. 1 is a plan view showing a liner embodying my invention assembledwith a crown type of closure.

Fig. 2 is a sectional view taken along the line 22 of Fig. 1.

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 2.

Fig. 4 is a sectional view showing the relation between a linerembodying my invention and 'a conventional cap and bottle neck.

Fig. 5 is a plan view of a liner embodying a. series of diamond shapeapertures positioned to overlie the sealing surface or finish of abottle.

Fig. 6 is a sectional view taken along the line 6--6 of Fig. 5.

Fig. 7 is a plan view showing another arrangement of slits in the liner,

Fig. 8 is a sectional view taken along the line 88 of Fig. 7.

Fig. 9 is a plan view of still a further arrangement of slits in aliner.

Fig. 10 is a sectional view taken along the line Ill-l0 of Fig. 9. p

In all of the illustrated embodiments of my invention, the liner isformed of .pulpboard, cotton, or some similar material which is suitablyliquid-proofed in any conventional or preferred manner. The materialemployed has little, if any, resilience and normally in liner formationis not readily nor sufficiently compressible to function as a substitutefor cork, etc. Slits, slots or other openings, extending through theentire thickness of the liner and properly located, facilitate andpermit compression of the pulp-board sealing surfaces.

tial compression (which is high due to the per-- etc., in the vicinityof the bottle finish'and the consequent creation of a perfect seal.

In Figs. 1 to 4 the line embodying my invention is assembled with acrown type metal closure [5 which is attachable to the beaded, or lippedneck I5, of a bottle (not shown). Other well known types of closures maywell be used. In every I instance the liner is provided with slots, oropenings in that area which will directly contact the sealing surfaceIT, or finish of the container so that top pressure applied to the crowncap, or closure during the sealing'operation may operate to compress theliner immediately over the sealing surface and force it into intimatesealing contact with said surface.

In Figs. 1 to 4 the liner I8 is of disk formation, constructed ofliquid-proofed pulpboard, cotton or similar material and provided in thesealing area IS with annular series of circumferentially extending slots20. The slots of the two series are staggered as shown. As a result ofproviding these slots in the sealing area (that area which directlyengages the sealing surface of the bottle), the liner in this particularzone will compress incident to the application of top pressure to theclosure during the capping operation more readily and to a greaterdegree than a solid imperforate sheet. Vertical compression of asufficient degree is possible only due to the presence of the verticalslots which allow horizontal expansion, or flow of portions of thepulpboard between and immediately adjacent the perforations, when toppressure is applied thereto.

After the liner has been compressed and the closure skirt crimped overthe lip of the container, the top pressure is released. The liner thentends to expand slightly and consequently insures effective sealingcontact between the The greater the degree of iniforations) the betterthe seal, as is obvious.

In Figs. 5 and 6 relatively large apertures 2| substantially diamondshape, are substituted for the slots 20. These apertures are arranged inan annular series in the sealing area and function to facilitate highcompression of this part of the liner and creation of intimate firmcontact between the liner and container.

In Figs. '7 and 8 radial and circumferential slots 22 and 23respectively are arranged in alternation in an annular path. Here-againthe slots function as do those shown in Figs. 1 to 4.

The two concentric annular series of radial staggered slots 24, shown inFigs. 9 and 10, also function (as do the openings in Fig. 5) tofacilidisk including a sealing area, said disk having an annular seriesof individual closely spaced openings in the sealing area, wherebyportions of the pulpboard may flow into said openings incident to theapplication of top pressure to the disk and thereby facilitatecompression of the liner.

JEROME P. CURRAN.

